<template>
  <!-- bug 输入内容后，拖动下面内容，必须双击输入框才能输入内容 -->
  <!--template 外面一个元素必须包裹所有标签-->
  <div>
    <div class="search">
      <input
        v-model="keyword"
        type="text"
        class="search-input"
        placeholder="输入城市名或拼音"
      />
    </div>
    <div
      class="search-content"
      ref="search"
      v-show="keyword"
    >
      <ul>
        <li
          class="search-item border-bottom"
          v-for="item of list"
          :key="item.id"
          @click="handleCityClick(item.name)"
        >
          {{item.name}}
        </li>
        <li class="search-item border-bottom" v-show="hasNoData">
          没有匹配到数据
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import Bscoll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  data () {
    return {
      keyword: '',
      list: [],
      timer: null
    }
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  computed: {
    hasNoData () {
      return !this.list.length
    }
  },
  watch: {
    keyword () {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 ||
              value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 100)
    }
  },
  mounted () {
    this.scroll = new Bscoll(this.$refs.search)
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .search
    height .72rem
    padding 0 .1rem
    background $bgColor
    .search-input
      box-sizing border-box
      width 100%
      height .62rem
      line-height .62rem
      padding 0 .1rem
      text-align center
      //针对不同内核的私有前缀Vue-cli会自动补充
      // -moz-border-radius: 5px; gecko 火狐
      // -webkit-border-radius: 5px;  chrome safari
      // -o-border-radius: 5px;著作权归作者所有。  opera
      border-radius .06rem
      color #666
  .search-content
    //遮住list
    z-index: 1
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    background: #eee
    .search-item
      line-height: .62rem
      padding-left: .2rem
      background: #fff
      color: #666
</style>
